The KSQ304x series from Meagacon AS is a digitally controlled frequency, synchronising, and load controller for single generator sets operating in co-generation, peak-shaving, or emergency standby configurations. It provides precision spot-on synchronising — initiating the breaker close command at the calculated lead time so that electrical closure occurs at the 12 o'clock (zero-phase) point — and manages loading and unloading slope for smooth transitions between island and mains-parallel operation. The controller is compatible with any make of generator starter and fuel regulator.

What variants are available in the KSQ304x series and how do they differ?

Three primary variants address different operational requirements. The KSQ304E and updated KSQ304E2 are designed for automatic co-generation management, including peak shaving, fixed load export to the mains, and load limiting control. The KSQ304EG2 is configured for emergency and standby generator applications, adding no-break load transfer back to the mains and a generator load test function that exports power to the mains for periodic testing without interrupting the load. All variants include breaker trip and automatic reset, adjustable frequency and voltage windows (±2–15%), and a system status relay output (closed in normal operation, open on alarm or power loss).

How does the KSQ304x control engine speed during synchronisation and load sharing?

The controller outputs raise/lower relay pulses — with independently adjustable pulse width (0.1–1.6 seconds) and pulse rate (10–60 pulses per minute) — to drive the fuel regulator or an MXR845x electronic potentiometer. It employs a proportional/integral (P/I) control characteristic with a dynamically adjusted dead zone. For generator controllers that accept an analogue speed reference, an optional -10/0/+10 mA DC output (corresponding to -5/0/+5 Hz offset) is available. An analogue load trim input (0–10 mA DC = 0–110% of generator nominal kW) allows external power management systems to adjust the load setpoint dynamically.